Slot drains are a popular drainage solution due to their ability to provide a large amount of drainage without compromising aesthetics. These slot drains boast a wide internal volume with minimal surface opening, allowing for high capacity in terms of water flow with the added benefit of a sleek, unobtrusive aesthetic appeal.

WSSC Water maintains a database of annually tested backflow preventers. Information from electronically submitted test reports is directly uploaded to this database. In addition, the database can determine when backflow assemblies are out-of-date for testing and generate reminder notices.

Therefore, directly connected water piping requires a different method of protection; the backflow preventer. A backflow preventer is a “one-way” appurtenance (an assembly of check valves or a vacuum breaker), that only allows water to flow in the desired direction and physically impedes reverse flow.

Backflow preventionstandards

Backflow Preventeris a “one-way” appurtenance (an assembly of check valves or a vacuum breaker), that only allows water to flow in the desired direction and physically impedes reverse flow.

Federal, state and underwriting authorities mandate that water purveyors, like WSSC Water, follow-up on cross-connections and backflow prevention, in addition to initial construction efforts. Since 2010, WSSC Water has increased its efforts in this area.

WSSC Water started the Cross-Connection Control Program to keep the drinking water safe for everyone. Unprotected or improperly protected cross-c...

If you are using a catch basin, find the pipe stud-in location and use a hole saw to drill a hole in your catch basin that fits the pipe size, and connect it. If you are not using a catch basin, move on to the next step.

Backflow preventionTest Kit

Place your channel drain in the trench at the appropriate height, making sure it is in line with the string from Step 2. Afterwards, connect your drain pipe to the end drain outlet. Once the end outlet has been connected, caulk the joints to prevent any leaks.

Also referred to as Backflow Prevention Assemblies; Backflow Assemblies; Testable Assemblies; or simply, Assemblies. Backflow Prevention Assemblies are generally required on the more hazardous cross connection applications, see below. By federal, state and local requirements as well as the manufacturer’s product listing, annual testing is required to ensure the assembly is good working order. This is due in part because the working components of a backflow assembly have a fairly short life expectancy and/or because sediment and debris can easily block their proper function.

The following is presented to provide a general explanation on the subject of backflow prevention. It is not intended to be used in place of Code requirements and professionals should always utilize the code when making design, installation, and/or maintenance decisions. Definitions of italicized words follow at the end.

Once you’ve excavated the trench, remove any stones or debris left inside. Afterwards, fix a string at the finished channel height. It will help you ensure your channel drain is not too high or too low. Then, spread a 2-inch layer of sand across the trench and use a shovel to press it down until it is flat and even. This will be your trench's foundation.

With the required tools, dig out the trench. Be sure to create 4-inches of space on all sides (including the bottom) for the concrete backfill.

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From options that are suitable for pedestrian areas to commercial entrances subject to light vehicular traffic, to areas that must withstand the heaviest industrial use and conditions, all of our trench drain systems have been crafted to provide superior drainage performance and durability.

When your caulking has dried, tape drain channel and the side grate locks to prevent concrete from seeping inside the drainage system and preventing proper drainage.

At Vodaland, our diverse range of slot and trench drain systems covers everything from light pedestrian use to the heaviest industrial applications.

Cross-Connectionis the physical connection between the potable water system and an “end-use” where a potential hazard exists.

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Trench drain systems offer a versatile and effective drainage solution for numerous applications, providing efficient runoff collection. Constructed with a range of materials, each drainage system provides specific characteristics that make them suitable for specific uses, with varying channel depths, widths and load ratings available.

Testing of backflow assemblies shall be performed in the spring when system start-up/reactivation occurs. This typically applies to irrigation systems, pools, pool houses, summer/beach houses, campgrounds, park restrooms, amusement rides, etc. WSSC Water is systematically resetting all annual test due dates to May 1. Note: testing is only required once per year, but from this point forward, it should be done in the spring, before May 1.

From pre-installation planning and preparation, to the trench itself, and post installation maintenance, this guide is full of actionable steps that you can follow to ensure the trench gets installed properly.

Industrial trench drains are designed to handle the toughest applications. With load class ratings ranging from C to F, industrial channels are designed to support the heavy loads of industrial traffic, like those of forklifts or heavy pallet jacks.

The following is a quick view of applications that require either a testable or non-testable backflow preventer. For a comprehensive look at selection criteria please visit in the WSSC Water Plumbing and Fuel Gas Code. In fact, take a look at Chapter 5 in its entirety; it is all about Cross-Connection Control.

Direct Connectionwater distribution piping connected, without an air gap, to an “end-use” where a potential source of contamination exist.

After the trench drain installation is finished, the next step is to remove the tape that was used for protection. Once the channel opening is exposed, you can securely place the drain cover over it to complete your trench drain system.

WSSC Water needs your help to catch-up on years of non-reporting and a general lack of follow-up compliance (testing). To enhance the database and ensure follow-up compliance, WSSC is asking its commercial and industrial water customers to complete a self inspection or “self survey” of all connections to the water system within their property. Homeowners who have a testable backflow assembly are asked to self report as well; a simple call or email will do. See contact information below.

Backflow preventiontesting

Also referred to as Backflow Technician; Backflow Tester; or simply, Tester. By Maryland Law, and subsequently by WSSC Water Plumbing Code, Backflow Techs must be registered as, at minimum, a Journeyman Plumber and also have completed a WSSC Water Approved 32-hour certification course for Cross-Connection Technicians (and recertify every 3 years).

Air Gapthe un-obstructed vertical distance between a water outlet and the flood rim level of a potential source of contamination; the air gap shall not be less than twice the diameter of the water outlet and never less than one (1) inch.

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When these unfavorable hydraulic events are occurring, contaminates can be back-siphoned into the drinking water due to negative pressures; or contaminates can back-pressured into the drinking water due to excessive pressure imposed by the water utilizing piece of equipment or process.

Trench drains, also known as channel drains, are a great option for dealing with water runoff or standing water. As a result, you can usually find them in areas where excess water tends to accumulate such as driveways, sidewalks, and parking lots. The trench itself is slightly sunken into the ground with a cover to make sure water gets in and larger items don’t.

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Compliance may also help in reducing your liability. Note: if you are responsible for a cross-connection (whether un-protected, improperly protected, or out-of-date for service) and a backflow event occurs, you may be liable for the resultant sickness, death, or property damage.

When drinking water piping connects to various plumbing fixtures or water utilizing equipment a cross-connection is created. If improperly protected, contamination can result when a backflow event occurs; allowing contaminates to reverse flow from the fixture/equipment back into the drinking water piping.

If you take the time to plan out your project and make precise measurements, trench drain installation can be done without much hassle. Once you have planned out your installation and have a clear work area, follow the instructions below.

The survey may be completed by a knowledgeable representative of the owner or tenant or by a licensed plumber who has a current cross-connection certification. If you are a property or building owner, please have the survey completed for the backflow assemblies under your ownership and control. If you are a tenant or unit owner, please complete the survey for the backflow assemblies under your ownership and control. Please share this notice openly between ownership and tenants so the overall results will be all inclusive and accurate with respect to controlling entities.

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So around the home and office, for the most part, standard plumbing fixtures do not present a hazardous condition. However, additional protections are needed for household items such as: hand held shower heads; hose bibbs; lawn irrigation; and boilers.

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Therefore, cross-connection technicians have to be performing their duties under the direction of a registered plumbing services firm.

Numbered forms can only be purchased by registered plumbing services firms. Upon completion of a test on a testable assembly, registered cross-connection technicians are required to electronically submit their reports, to WSSC Water, within 30 business days.

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These devices require tagging to identify the installation and/or expiration date. Homeowners can replace these devices without permit or inspection.

Plumbing Servicesmeans to install, maintain, extend, alter, or remove piping, a plumbing fixture, a plumbing appliance, a plumbing appurtenance, or other plumbing apparatus within a building or on-property where such plumbing is connected to a public or private sewerage system or connected to a private or public water system.

When required testing fails to produce satisfactory results, assemblies must be cleaned and/or rebuilt as needed and retested. Un-repairable or obsolete assemblies must be replaced. See more below, for reporting, permitting, and licensing requirements.

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Permit Services is open Monday-Friday, 7 a.m.-4 p.m. except Wednesdays, 7 a.m.- Noon. Call us at 301-206-4003 for more information.

Also referred to as Backflow Prevention Devices; Backflow Devices; Non-Testable Devices; or simply Devices. Backflow Prevention Devices are generally required on the less hazardous cross-connection applications, see below. Some devices are required to be rebuilt or replaced every five years; while others are good for the life of the fixture they serve or until they visibly fail (leak externally). See below.

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WSSC Water began with its own treatment plants and pumping stations to ensure that we are in full compliance; we are. Then inspections commenced on a priority based matrix, where the highest priority was given to commercial properties, containing the highest degree of hazards, coupled with an assessment of their hydraulic vulnerability.

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Rationale: Backflow assemblies that have been de-pressurized, removed or winterized in-place are at the greatest risk of failure because they were subjected to “no-flow”, “no-pressure” conditions. Like most mechanical devices, lack of movement is bad on the working parts, not to mention the affect dried residue and/or nesting bugs can have on them as well.

The Easy Home System is a great solution for those wanting to create a low weight installation for pedestrian only use. These channel drains are easy to work with and versatile enough for most residential needs. With all products compatible for easy connection with no need for adapters, this system offers the perfect solution for DIY projects.

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If you're experiencing a water emergency, such as a broken water main, or a sewer emergency, report it using our mobile app, email the Emergency Services Center, or call us at 301-206-4002.

Backflowis the undesired reverse flow of contaminants into the potable water from an “end-use” hazard and is typically driven by common, but unfavorable, hydraulic events in either the public or private water distribution system.

When discovered, un-protected water uses, or protected outlets that are overdue for a test, must be corrected. Maryland State Plumbing Code, and subsequently WSSC Water’s Plumbing Code, requires the installation and testing of backflow prevention assemblies to be performed by licensed plumbers who also possess certification as a backflow technician.

Hint for owners: for pools and irrigation systems, make the testing part of your spring start-up contract. The pool and irrigation firms may be able to procure the most favorable pricing due to the ability to deal in volume with plumbing services firms.

Installing a trench drain is a great way to protect areas of your home or business from water damage. It can be a daunting task if you don’t know where to start; however, this guide will take you through the basics of trench drain installation.

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is responsible for inspecting existing buildings for un-protected or improperly protected cross-connections. WSSC Water currently has eight full time inspectors canvassing the service area on the established priority basis. The program also utilizes a strong administrative support staff to maintain our database, send reminder notices, and administer our self-survey program, more below.

Modern plumbing fixtures generally have built-in backflow protection. For instance, a faucet spout terminates above the flood rim level of the sink or tub. So if the sink or tub is full of dirty water or worse, backed-up sewage, there is no possible way for backflow because of the air gap created by the elevated spout. Toilet fill valves, clothes washers, dishwashers, and refrigerator/ice makers also employ some type of built-in air gap as their method of protection.

Under Maryland Law, only firms registered under a licensed Master Plumber can perform Plumbing Services which includes the installation, repair and testing of backflow prevention assemblies.

In addition to the few items around the home that require additional protection, there are numerous applications within commercial and industrial processes that require additional protection. In general, these applications cannot utilize the air gap method of protection because the equipment or process requires a direct connection in order to utilize the dynamic pressure and flow that already exists within the water distribution system.

The following link is a list of approved service providers who have declared they provide this specialty line of services. WSSC Water has validated their licensing credentials, but does not endorse these firms; you are free to choose any licensed firm.

Industry experts recognize that WSSC Water Code Officials (Plan Reviewers and Inspectors), Design Engineers, Plumbing Installers and knowledgeable owners have done an exceptional job to ensure that the right form of backflow protection was specified, approved, and installed, over recent decades, for tens of thousands of cross-connections. However, perpetual maintenance is equally as important.

Conditions that are likely to create a backflow event are typically common, but unfavorable, hydraulic events that occur within the public or private segments of the water distribution system such as: an owner or worker draining down a house or building to make a plumbing repair; a broken water main or distribution pipe; severe/widespread power outages; fire fighters using large quantities of water to extinguish a fire, or; a water utilizing piece of equipment or process creating pressures greater than those present in water distribution system.

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The “first time” installation of a new testable backflow assembly or relocation of an existing testable assembly requires a long form permit and inspection.